Hilary Duff: "I Can't Believe I Have a Baby!"

Four days into her latest and greatest role as a proud parent, Hilary Duff couldn't be more pleased with her "adorable" baby.

The 24-year-old new mom once again took to Twitter to gush about her and husband Mike Comrie's bundle of joy, Luca Cruz.

In a message posted on Friday (March 23), Hilary wrote, "Wow I can't believe I have a baby!the most wonderful,sweet,adorable baby!thank you all for the messages and well wishes!love you all so much"

As previously reported by GossipCenter, the "Cheaper By the Dozen" actress announced the arrival of her son on Thursday, as she tweeted, "Welcome to the World Luca Cruz Comrie! Tuesday evening, we became proud parents of a healthy 7 pound 6 ounce beautiful boy. We are overjoyed and feel like the luckiest parents in the world."

Joining in bride in sharing the grand news, Comrie added, "Welcome to the World Luca Cruz Comrie! Can't express my feelings for you right now."